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@ARTICLE{Preuster:829270,
author = {Preuster, Patrick and Papp, Christian and Wasserscheid,
Peter},
title = {{L}iquid {O}rganic {H}ydrogen {C}arriers ({LOHC}s):
{T}oward a {H}ydrogen-free {H}ydrogen {E}conomy},
journal = {Accounts of chemical research},
volume = {50},
number = {1},
issn = {1520-4898},
address = {Columbus, Ohio},
publisher = {American Chemical Soc.},
reportid = {FZJ-2017-03000},
pages = {74 - 85},
year = {2017},
abstract = {The need to drastically reduce CO$_{2}$ emissions will lead
to the transformation of our current, carbon-based energy
system to a more sustainable, renewable-based one. In this
process, hydrogen will gain increasing importance as
secondary energy vector. Energy storage requirements on the
TWh scale (to bridge extended times of low wind and sun
harvest) and global logistics of renewable energy
equivalents will create additional driving forces toward a
future hydrogen economy. However, the nature of hydrogen
requires dedicated infrastructures, and this has prevented
so far the introduction of elemental hydrogen into the
energy sector to a large extent. Recent scientific and
technological progress in handling hydrogen in chemically
bound form as liquid organic hydrogen carrier (LOHC)
supports the technological vision that a future hydrogen
economy may work without handling large amounts of elemental
hydrogen. LOHC systems are composed of pairs of
hydrogen-lean and hydrogen-rich organic compounds that store
hydrogen by repeated catalytic hydrogenation and
dehydrogenation cycles. While hydrogen handling in the form
of LOHCs allows for using the existing infrastructure for
fuels, it also builds on the existing public confidence in
dealing with liquid energy carriers. In contrast to hydrogen
storage by hydrogenation of gases, such as CO$_{2}$ or
N$_{2}$, hydrogen release from LOHC systems produces pure
hydrogen after condensation of the high-boiling carrier
compounds.This Account highlights the current
state-of-the-art in hydrogen storage using LOHC systems. It
first introduces fundamental aspects of a future hydrogen
economy and derives therefrom requirements for suitable LOHC
compounds. Molecular structures that have been successfully
applied in the literature are presented, and their property
profiles are discussed. Fundamental and applied aspects of
the involved hydrogenation and dehydrogenation catalysis are
discussed, characteristic differences for the catalytic
conversion of pure hydrocarbon and nitrogen-containing LOHC
compounds are derived from the literature, and attractive
future research directions are highlighted.Finally,
applications of the LOHC technology are presented. This part
covers stationary energy storage (on-grid and off-grid),
hydrogen logistics, and on-board hydrogen production for
mobile applications. Technology readiness of these fields is
very different. For stationary energy storage systems, the
feasibility of the LOHC technology has been recently proven
in commercial demonstrators, and cost aspects will decide on
their further commercial success. For other highly
attractive options, such as, hydrogen delivery to hydrogen
filling stations or direct-LOHC-fuel cell applications,
significant efforts in fundamental and applied research are
still needed and, hopefully, encouraged by this Account.},
cin = {IEK-11},
ddc = {540},
cid = {I:(DE-Juel1)IEK-11-20140314},
pnm = {134 - Electrolysis and Hydrogen (POF3-134)},
pid = {G:(DE-HGF)POF3-134},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000392457800010},
pubmed = {pmid:28004916},
doi = {10.1021/acs.accounts.6b00474},
url = {https://juser.fz-juelich.de/record/829270},
}